What Size Are The Studs On The 1st Gen Diesel 3/4 Tons...are They 1/2" Or 5/8" Or ??? I PICKED UP A SET OF SPLINE DRIVE LUGS FOR A 3RD GEN 2500/ 3500 BUT THEY'RE WAY TOO BIG...

 

3/4 tons stock 1/2-20 thread for the studs.

 

1 ton dually trucks are 5/8 all the way around...found out the hard way last week! Bought a new set of nuts for my SRW conversion and got 40 miles to home before I found out the difference. The tire shop didn't have a clue and I had to order them in from another shop!

 

My 3/4 ton studs were all 1/2"

When I made the change to dually wheels, I drilled and reamed the adapters and now have 9/16" studs all around.
Bob

 

My W350 SRW had 1/2 all around but the holes were big enough for 9/16 and now it has them.